CN112973435A - Formaldehyde-removing air filtering non-woven fabric - Google Patents

Abstract

The invention discloses a formaldehyde-removing air-filtering non-woven fabric which comprises a base layer, an active carbon layer, a photocatalyst layer, a surface layer and a formaldehyde collecting layer, wherein a plurality of grooves are formed in the base layer, the active carbon layer comprises a plurality of active carbon blocks, each active carbon block is clamped in the groove and is abutted against the base layer, one surface of the photocatalyst layer is abutted against the edge of the groove, the other surface of the photocatalyst layer is abutted against the surface layer, and the surface layer is back to the photocatalyst layer and is connected with the formaldehyde collecting layer. According to the formaldehyde-removing air filtration non-woven fabric, formaldehyde is absorbed through the formaldehyde collecting layer, the photocatalyst layer and the activated carbon layer, so that the formaldehyde absorption effect of the non-woven fabric is improved; in addition, through set up the recess on the basic unit, locate the active carbon piece card in the recess to utilize the top layer to carry out the shutoff to the recess, the active carbon piece is restricted in the recess all the time under the common constraint on recess and top layer, is difficult for droing, thereby has guaranteed the continuous absorption of non-woven fabrics to formaldehyde, and then has promoted the market competition of non-woven fabrics.

Description

Formaldehyde-removing air filtering non-woven fabric

Technical Field

The invention relates to the technical field of non-woven fabrics, in particular to a formaldehyde-removing air-filtering non-woven fabric.

Background

Non-woven fabrics are fabrics which are formed by the directional or random arrangement of textile short fibers or filaments to form a fiber web structure and are reinforced by mechanical, thermal bonding or chemical methods and the like. The non-woven fabric has the characteristics of moisture resistance, air permeability, flexibility, light weight, no combustion supporting, easy decomposition, no toxicity or irritation, rich color, low price, recycling and the like, so that the non-woven fabric is widely used in medical treatment, cosmetology, clothing, industry and agriculture to reduce the production cost of products and improve the quality of the products. In the in-service use of production, still often make the filtering layer with the non-woven fabrics and filter the air, it is specific, block the impurity in the air through the gap between each layer fibre on the non-woven fabrics to realize impurity and clean air's separation, thereby reach air purification's effect.

However, the traditional non-woven fabric for air filtration has a single structure, can only intercept large-particle impurities through meshes of the non-woven fabric, and has a poor effect of removing toxic and harmful gases with small sizes in the air; part can be used to remove the non-woven fabrics of formaldehyde often through grinding into the powder with the active carbon granule to in adding this powder to the fibre of non-woven fabrics, this kind of non-woven fabrics is in the use, and the active carbon granule easily drops from between the non-woven fabrics fibre, thereby influences the absorption effect of non-woven fabrics to formaldehyde, is unfavorable for promoting the market competition of product.

Disclosure of Invention

Therefore, it is necessary to provide a formaldehyde-removing air filtration nonwoven fabric aiming at the technical problems that the activated carbon particles are easy to fall off and the formaldehyde absorption effect is poor.

The utility model provides a remove formaldehyde air filter non-woven fabrics, should remove formaldehyde air filter non-woven fabrics includes basic unit, activated carbon layer, photocatalyst layer, top layer and formaldehyde collecting layer, a plurality of recesses have been seted up on the basic unit, the activated carbon layer includes a plurality of activated carbon blocks, each the activated carbon block card is located the recess and with basic unit looks butt, the one side on photocatalyst layer with the edge looks butt of recess, the another side on photocatalyst layer with top layer looks butt, the formaldehyde collecting layer dorsad photocatalyst layer and with the top layer is connected.

In one embodiment, the photocatalyst layer includes a glass fiber mesh and a photocatalyst coated on the glass fiber mesh.

In one embodiment, the glass fiber mesh cloth is provided with a plurality of through holes, and each through hole is correspondingly communicated with one groove.

In one embodiment, a plurality of limiting bulges are arranged on the surface layer, and each limiting bulge sequentially penetrates through one through hole and one groove and is abutted with one activated carbon block; the photocatalyst layer is arranged between the base layer and the surface layer and is respectively abutted against the edge of the groove and the edge of the limiting bulge.

In one embodiment, the limiting protrusion is in a step-like structure.

In one embodiment, the base layer is provided with a clamping groove, and the glass fiber mesh cloth is provided with a clamping block which is inserted into the clamping groove and abuts against the inner surface of the clamping groove.

In one embodiment, the base layer is further provided with a plurality of limiting baffle rings, the limiting baffle rings are arranged on the notches of the grooves and abut against the inner surfaces of the grooves, and the limiting baffle rings abut against the activated carbon blocks.

In one embodiment, the retainer ring is a porous flexible ring.

In one embodiment, the formaldehyde collecting layer is a formaldehyde catching agent uniformly coated on the surface layer.

In one embodiment, the ratio of the thickness of the formaldehyde collecting layer to the thickness of the surface layer is less than 0.1.

According to the formaldehyde-removing air filtration non-woven fabric, the photocatalyst layer is arranged between the base layer and the surface layer, the formaldehyde collecting layer is arranged on the surface layer, after formaldehyde in the air is contacted with the formaldehyde collecting layer, part of formaldehyde is absorbed by the formaldehyde collecting layer, other formaldehyde molecules enter between the surface layer and the base layer through the pores of the surface layer, the formaldehyde is further decomposed by the photocatalyst layer, and the residual formaldehyde is adsorbed by the activated carbon layer, so that the absorption effect of the non-woven fabric on the formaldehyde is improved; in addition, through set up the recess on the basic unit, locate the active carbon piece card in the recess to utilize the top layer to carry out the shutoff to the recess, the active carbon piece is restricted in the recess all the time under the common constraint on recess and top layer, is difficult for droing, thereby has guaranteed the continuous absorption of non-woven fabrics to formaldehyde, and then has promoted the market competition of non-woven fabrics.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of a formaldehyde-removing air-filtering nonwoven fabric;

FIG. 2 is a schematic view of an exploded structure of an air filtration nonwoven fabric for removing formaldehyde in one embodiment;

FIG. 3 is a schematic diagram of the structure of a base layer in one embodiment;

FIG. 4 is a schematic diagram of a partial enlarged structure of the base layer in the embodiment shown in FIG. 3;

FIG. 5 is a schematic diagram of the structure of the photocatalyst layer in one embodiment;

FIG. 6 is a schematic structural diagram of a skin layer in one embodiment.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 and 2 together, the invention provides a formaldehyde-removing air-filtering non-woven fabric 10, the formaldehyde-removing air-filtering non-woven fabric 10 includes a base layer 100, an activated carbon layer 200, a photocatalyst layer 300, a surface layer 400 and a formaldehyde collecting layer 500, the base layer 100 is provided with a plurality of grooves 110, the activated carbon layer 200 includes a plurality of activated carbon blocks 210, each activated carbon block 210 is clamped in the groove 110 and abuts against the base layer 100, one surface of the photocatalyst layer 300 abuts against the edge of the groove 110, the other surface of the photocatalyst layer 300 abuts against the surface layer 400, and the formaldehyde collecting layer 500 faces away from the photocatalyst layer 300 and is connected with the surface layer 400.

According to the formaldehyde-removing air filtration non-woven fabric 10, the photocatalyst layer 300 is arranged between the base layer 100 and the surface layer 400, the formaldehyde collecting layer 500 is arranged on the surface layer 400, after formaldehyde in the air is contacted with the formaldehyde collecting layer 500, part of formaldehyde is absorbed by the formaldehyde collecting layer 500, other formaldehyde molecules enter between the surface layer 400 and the base layer 100 through the pores of the surface layer 400, the formaldehyde is further decomposed by the photocatalyst layer 300, and the residual formaldehyde is absorbed by the activated carbon layer 200, so that the formaldehyde absorption effect of the non-woven fabric is improved; in addition, through seting up recess 110 on basic unit 100, locate recess 110 with active carbon block 210 card in to utilize top layer 400 to carry out the shutoff to recess 110, active carbon block 210 is restricted in recess 110 all the time under recess 110 and top layer 400's common constraint, is difficult for droing, thereby has guaranteed the continuous absorption of non-woven fabrics to formaldehyde, and then has promoted the market competition of non-woven fabrics.

The base layer 100 is a main body of the non-woven fabric, and is used for disposing the activated carbon layer 200 and the photocatalyst layer 300, so as to facilitate the activated carbon layer 200 and the photocatalyst layer 300 to absorb formaldehyde in the air. It should be noted that, in an embodiment, the base layer 100 is made of polypropylene granules through operations such as high-temperature melting, spinning, line laying, hot-pressing and reeling, and the inside of the base layer has a large number of randomly arranged fiber filaments, and each fiber filament is overlapped and forms a plurality of tiny pores, and the pores are used for providing a flow channel for purified clean air so as to guide the clean air out of the base layer 100. The base layer 100 is provided with a plurality of grooves 110, and preferably, the base layer 100 is uniformly provided with a plurality of grooves 110. Each groove 110 is used for accommodating an activated carbon block 210, so that after the activated carbon block 210 is accommodated in the groove 110, the activated carbon block 210 is limited in the groove 110 under the constraint of the inner surface of the groove 110. It can also be understood that the activated carbon blocks 210 are not easy to move on the base layer 100, so that the activated carbon blocks 210 are uniformly distributed on the base layer 100, that is, the difference of formaldehyde absorbable in unit area of the non-woven fabric is small in unit time, thereby ensuring the consistency of product quality.

Referring to fig. 3 and 4, in an embodiment, the base layer 100 further includes a plurality of limiting rings 120, the limiting rings 120 are disposed in the notches of the grooves 110 and abut against the inner surfaces of the grooves 110, and the limiting rings 120 abut against the activated carbon blocks 210. The limiting baffle ring 120 is arranged at the notch of the groove 110, so that the activated carbon block 210 can be prevented from being separated from the groove 110, and moves along the gap between the base layer 100 and the surface layer 400, and finally falls off from the base layer 100 and the surface layer 400, and the continuous absorption of the non-woven fabric to formaldehyde is ensured. In one embodiment, the retainer ring 120 is a porous flexible ring. Therefore, in the process of clamping the activated carbon block 210, the activated carbon block 210 can be placed on the limit stop ring 120, and then the activated carbon block 210 is pressed, so that the activated carbon block 210 synchronously presses the limit stop ring 120 and causes the limit stop ring 120 to generate elastic deformation, in this case, the aperture of the inner ring of the limit stop ring 120 is enlarged, and when the aperture of the inner ring of the limit stop ring 120 is consistent with the particle size of the activated carbon block 210, the activated carbon block 210 falls into the groove 110. At this time, the stress on the limit stop ring 120 is relieved, the elastic deformation is recovered, and the limit stop ring 120 after the deformation is recovered blocks the activated carbon block 210 to prevent the activated carbon block 210 from moving to the edge of the groove 110, so that the stability of the connection between the base layer 100 and the activated carbon block 210 is ensured. It should be noted that, in this embodiment, the plurality of micropores 121 are formed in the limit stop ring 120, so that when formaldehyde penetrates through the surface layer 400 and moves to a position between the surface layer 400 and the base layer 100, formaldehyde molecules can pass through the micropores 121 in the limit stop ring 120 and contact with the activated carbon block 210, so that the overlapping area of the limit stop ring 120 and the activated carbon block 210 when abutting against each other can be compensated, that is, the influence of the limit stop ring 120 on the contact area of the activated carbon block 210 and formaldehyde is reduced, thereby ensuring the formaldehyde absorption effect of the non-woven fabric.

The activated carbon layer 200 is used for absorbing formaldehyde molecules entering between the base layer 100 and the surface layer 400, so as to reduce the formaldehyde content in the air and further improve the air quality. The active carbon is porous solid carbon, has large specific surface area and large contact area with air. It should be noted that, the inside of the activated carbon has a large number of capillaries with tiny pore diameters, and the capillaries have strong adsorption capacity, so that when the activated carbon contacts with air, formaldehyde and impurities in the air are adsorbed by the capillaries of the activated carbon, thereby reducing the content of formaldehyde and impurities in the air and achieving the purpose of purifying the air.

The photocatalyst layer 300 is used for decomposing formaldehyde molecules entering between the base layer 100 and the surface layer 400, so that the formaldehyde molecules are converted into non-toxic and harmless micromolecular substances, and the purpose of removing the formaldehyde is achieved. Referring to fig. 5, in an embodiment, the photocatalyst layer 300 includes a glass fiber mesh 310 and a photocatalyst 320, and the photocatalyst 320 is coated on the glass fiber mesh 310. The glass fiber mesh 310 is a substrate of the photocatalyst layer 300, and is used for supporting the photocatalyst 320, so as to connect the photocatalyst 320 with the base layer 100 and the surface layer 400. It should be noted that the glass fiber mesh 310 is a mesh made of glass fibers, the glass fibers have the characteristics of light weight, high strength, good toughness and the like, and the glass fiber mesh 310 made of glass fibers is not easily damaged by impact, so that the service life of the non-woven fabric can be effectively prolonged. The photocatalyst 320 is used for catalyzing the decomposition reaction of formaldehyde molecules, so that the formaldehyde molecules are decomposed into non-toxic small molecules. Preferably, the photocatalyst 320 is nano-sized titanium dioxide. When the non-woven fabric contacts with ultraviolet rays, the catalytic degradation performance of the photocatalyst 320 is enhanced, and the photocatalyst can promote the decomposition reaction of formaldehyde and other toxic gases in the air, such as benzene, toluene, xylene, ammonia, TVOC and other toxic substances, so that the toxic molecules are decomposed to form non-toxic substances with short molecular chains, thereby realizing the purification of the air.

In one embodiment, the glass fiber mesh 310 has a plurality of through holes 311, and each through hole 311 is correspondingly connected to one of the grooves 110. Through set up through-hole 311 on glass fiber screen cloth 310, when guaranteeing that the non-woven fabrics absorbs the effect to formaldehyde, reducible glass fiber screen cloth 310's quantity to reduce the manufacturing cost of non-woven fabrics. In one embodiment, the base layer 100 is provided with a locking groove 130, the glass fiber mesh 310 is provided with a locking block 312, and the locking block 312 is inserted into the locking groove 130 and abuts against an inner surface of the locking groove 130. So, in the production process of non-woven fabrics, only need insert fixture block 312 and locate in draw-in groove 130 and realize being connected of glass fiber screen cloth 310 and basic unit 100, avoided adopting top layer 400 to flatten the low problem of non-woven fabrics production efficiency that glass fiber screen cloth 310 arouses to the stability of connecting between each layer of non-woven fabrics has been guaranteed.

The surface layer 400 is used for limiting and fixing the activated carbon layer 200 and the photocatalyst layer 300 to prevent the activated carbon layer 200 and the photocatalyst layer 300 from falling off from the base layer 100, thereby ensuring the continuous absorption of formaldehyde by the non-woven fabric. The material and structure of the surface layer 400 are the same as those of the surface layer 400, and specific reference may be made to the description of the material and structure of the surface layer 400, which is not repeated herein. It should be noted that, during the use of the non-woven fabric, the turbid air passes through the pores of the non-woven fabric surface layer 400, the larger particle impurities in the air will abut against the edges of the pores and be trapped on one side of the surface layer 400, the smaller impurities and the air containing harmful gases such as formaldehyde enter the photocatalyst layer 300 and the activated carbon layer 200 sequentially through the pores, and the particle impurities adhere to the photocatalyst layer 300 and the activated carbon layer 200 when contacting the photocatalyst layer 300 and the activated carbon layer 200, thereby further reducing the content of the particle impurities. The formaldehyde and the harmful gas are decomposed by the photocatalyst layer 300 or absorbed by the activated carbon layer 200 to reduce the content of the formaldehyde and the harmful gas in the air, and the purified clean air finally flows out through the base layer 100, thereby completing the air filtering and purifying operation.

Referring to fig. 6, in an embodiment, a plurality of limiting protrusions 410 are disposed on the surface layer 400, and each limiting protrusion 410 sequentially penetrates through a through hole 311 and a groove 110 and abuts against an activated carbon block 210; the photocatalyst layer 300 is disposed between the base layer 100 and the surface layer 400 and is respectively abutted against the edges of the grooves 110 and the edges of the limiting protrusions 410. It can also be understood that the limiting protrusions 410 on the surface layer 400 abut against the activated carbon blocks 210, so that the activated carbon blocks 210 are limited in the grooves 110 under the common constraint of the inner surfaces of the grooves 110 and the limiting protrusions 410, and the activated carbon blocks 210 are not easy to shake in the grooves 110, thereby reducing activated carbon debris generated by the activated carbon blocks 210 colliding with the inner walls of the grooves 110, in other words, improving the connection stability of the activated carbon blocks 210 with the base layer 100 and the surface layer 400, so as to improve the quality of the non-woven fabric. In one embodiment, the position-limiting protrusion 410 has a step-like structure. Through designing spacing arch 410 into halfpace column structure, can reduce spacing arch 410 and insert the recess 110 in-process, the frictional force of spacing arch 410 and recess 110 inner wall to reduce the connection degree of difficulty of each layer of non-woven fabrics, with the production efficiency who promotes the non-woven fabrics.

The formaldehyde collecting layer 500 is used for pre-absorbing formaldehyde in the air so as to reduce the formaldehyde content in the air. It can be understood that the non-woven fabric provided by the invention can absorb formaldehyde three times through the formaldehyde collecting layer 500, the photocatalyst layer 300 and the activated carbon layer 200, so that the formaldehyde absorption effect of the non-woven fabric is improved, and the product quality is improved. In one embodiment, the formaldehyde collecting layer 500 is a formaldehyde scavenger uniformly coated on the surface layer 400. Preferably, the formaldehyde scavenger is porous montmorillonite. The montmorillonite has strong adsorption capacity and can absorb formaldehyde in the air so as to reduce the content of formaldehyde in the air. After formaldehyde in the air is absorbed by the montmorillonite for one time, residual formaldehyde passes through the pores of the montmorillonite to be sequentially contacted with the photocatalyst layer 300 and the activated carbon layer 200 and is absorbed by the photocatalyst layer 300 and the activated carbon layer 200, so that the content of the formaldehyde in the air is reduced, and the air is filtered and purified. In one embodiment, the ratio of the thickness of the formaldehyde collecting layer 500 to the thickness of the top layer 400 is less than 0.1. So, under the condition that realizes formaldehyde collecting layer 500 and once absorb formaldehyde, can prevent because of formaldehyde collecting layer 500 is too thick, when buckling to the non-woven fabrics, formaldehyde collecting layer 500 fracture drops and then the problem of inefficacy to guarantee formaldehyde collecting layer 500's integrality and its persistence to formaldehyde absorption effect.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The utility model provides a remove formaldehyde air filter non-woven fabrics, its characterized in that includes basic unit, activated carbon layer, photocatalyst layer, top layer and formaldehyde collecting layer, a plurality of recesses have been seted up on the basic unit, the activated carbon layer includes a plurality of activated carbon blocks, each activated carbon block card is located the recess and with basic unit looks butt, the photocatalyst layer one side with the edge looks butt of recess, the photocatalyst layer another side with top layer looks butt, the formaldehyde collecting layer dorsad photocatalyst layer and with the top layer is connected.

2. The formaldehyde-removing air-filtering nonwoven fabric as claimed in claim 1, wherein the photocatalyst layer comprises a glass fiber mesh fabric and a photocatalyst, and the photocatalyst is coated on the glass fiber mesh fabric.

3. The formaldehyde-removing air-filtering non-woven fabric according to claim 2, wherein the glass fiber mesh fabric is provided with a plurality of through holes, and each through hole is correspondingly communicated with one groove.

4. The formaldehyde-removing air-filtering non-woven fabric according to claim 3, wherein a plurality of limiting protrusions are arranged on the surface layer, and each limiting protrusion sequentially penetrates through one through hole and one groove and is abutted against one activated carbon block; the photocatalyst layer is arranged between the base layer and the surface layer and is respectively abutted against the edge of the groove and the edge of the limiting bulge.

5. The formaldehyde-removing air-filtering non-woven fabric according to claim 4, wherein the limiting protrusions are in a step-shaped structure.

6. The formaldehyde-removing air-filtering non-woven fabric according to claim 4, wherein the base layer is provided with a clamping groove, the glass fiber mesh is provided with a clamping block, and the clamping block is inserted into the clamping groove and abuts against the inner surface of the clamping groove.

7. The formaldehyde-removing air-filtering non-woven fabric as claimed in claim 1, wherein the base layer is further provided with a plurality of limit stop rings, the limit stop rings are arranged in the notches of the grooves and abut against the inner surfaces of the grooves, and the limit stop rings abut against the activated carbon blocks.

8. The formaldehyde-removing air-filtering nonwoven fabric as claimed in claim 7, wherein the limit stop ring is a porous flexible ring.

9. The formaldehyde-removing air-filtering non-woven fabric according to claim 1, wherein the formaldehyde collecting layer is a formaldehyde catching agent uniformly coated on the surface layer.

10. The formaldehyde-removing air-filtering non-woven fabric according to claim 9, wherein the ratio of the thickness of the formaldehyde collecting layer to the thickness of the surface layer is less than 0.1.

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